Saunier Duval Themaclassic F30E Instructions For Use Installation And Servicing page 36

Is the installation fitted with an
external sensor?
Is the installation fitted with a
room thermostat?
Is the heating setting high enough?
Is the heating power adequate?
- Check set point P3.
- Check the adjustment of the by-pass (too far open).
- F30E Only Check the 3-way valve is not passing
into the domestic hot water heat exchanger.
- Check the circulation in the radiators.
- Check the thermistor.
- If problem persists, change the interface
board or the control board (PCB).
Is the setting high enough?
Is the temperature higher if you reduce
the flow through the taps?
Check that the flow restrictor on the cold
water inlet is fitted.
Check the rate of flow.
4000122704-1
18 Fault Finding
FAULT: THE RADIATORS ARE LUKE-WARM.
NO
NO
YES
F30E ONLY
FAULT: THE WATER AT THE TAPS IS LUKE-WARM.
YES
YES
The temperature of the radiators
YES
depend on the outside temperature.
If the room temperature is not sufficient,
adjust
YES The radiators will only be hot if the
thermostat is demanding heat. If the
room temperature is not sufficient, turn
the setting of the room thermostat up.
NO
Turn it up.
NO
Turn it up.
Check the thermistor.
NO
Check the 3-way valve is not passing
into the radiators. (The radiators should
stay cold in Summer setting)
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